664466442330 has 16 divisors (see below), whose sum is σ = 1594719461664. Its totient is φ = 177191051280.

The previous prime is 664466442259. The next prime is 664466442331. The reversal of 664466442330 is 33244664466.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 664466442330.

It is not an unprimeable number, because it can be changed into a prime (664466442331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11074440676 + ... + 11074440735.

It is an arithmetic number, because the mean of its divisors is an integer number (99669966354).

Almost surely, 2^664466442330 is an apocalyptic number.

664466442330 is an abundant number, since it is smaller than the sum of its proper divisors (930253019334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664466442330 is a wasteful number, since it uses less digits than its factorization.

664466442330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22148881421.

The product of its (nonzero) digits is 5971968, while the sum is 48.

The spelling of 664466442330 in words is "six hundred sixty-four billion, four hundred sixty-six million, four hundred forty-two thousand, three hundred thirty".